Whiteside Screw Type Helix Mortise Cutter w/Downshear, 3/4 in. CD is designed to create precise hinge mortises with ease. This versatile Helix Mortise Cutter can be used with both handheld and machine routers, featuring a down shear cutting design that ensures clean, splinter- cuts every time. The cutter boasts a 1/4-28 internal thread size and requires either a 1/4" or 1/2" shank Helix Mortise Arbor (HMA14 or HMA12, sold separately) for operation. Equipped with two carbide-tipped wings, this cutter durability and efficient performance. Manufactured by Whiteside Machine Company in Claremont, North Carolina, it measures 3/4" in cutting diameter, 5/8" in cutting length, and 7/8" overall length, making it a reliable choice for woodworking professionals and enthusiasts alike. Model Number: 13-750